i'm heather holmes, ktvu channel 2 news. >>> now to the south bay where authorities evacuated more than a dozen people after receiving reports of shortness of breath and skin irritation. this is developing news and matt keller has just learned within the hour what caused that strong odor that left so many people there feeling sick. >> reporter: monday night's are usually very busy at the club one here in the south san jose. but you can see there are very few cars or people here after an evacuation of woman's locker room. firefighters didn't take any chances inside using self- contained breathing apparatuses. personal trainer told me what happened right before they evacuated about 150 people from the building. >> one of my other clients came up to me and said, hey marlon there's something really strong in the bathroom. really strong and burning sensation, her eyes were burning and her -- she was coughing right after. >> reporter: a firefighter told me about 45 minutes ago that the odor was caused by eucalyptus room. the symptoms dissipate about an hour and a half. all of the victims went